You don't need to give an email address if you don't want to. But if you do, you decide whether or not it is visible. (No addresses will be given to third-parties, it's only there to make it easier for me to get back to you)

This script WILL log your IP adress.

Profanities, 'L337' speak, links to unrelated stuff like Pr0n and online gambling will result in your IP being banned, a message being sent to your ISP and anything else nasty I can think of...

Suspicious HTML in the comments field will also cause me to give you hell.

While I don't have any user registration here, that's no reason to use a 'nick' belonging to someone else.